If a company is present in multi-states and has multi-state GSTIN. Say, for e.g. XYZ Pvt. Ltd is present in MP, Bihar, Karnataka, Maharashtra and so on. Company has taken separate GST registration for each state.
Now, for a particular month, if a company wants to issues sales invoice to Bihar Customer. Company issued IGST Bill from MP GSTIN. Will it be valid? Is there any restriction to it?